Brien Tillett takes part in a Zumba fitness demonstration while working at a health fair in Las Vegas on July 9, 2016. Tillett exudes youthful idealism as he talks about casting his first vote in a presidential election. “It means a lot to me personally because I’m making a difference in my life and in the country. My vote does matter,” he said. “It really does.” (AP Photo/John Locher)

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